OF WASHINGTON. 501 



His descriptions of the new genus and the new species are ap 

 pended. 



Apocephalus, Coquillett, nov. gen. 



Near Phora, but the female furnished with a horny ovipositor about as 

 long as the last three abdominal segments taken together. Frontal setae 

 reclimate, two pairs of vertical and orbital bristles, a pair of postvertical 

 and ocellar bristles, the latter situated lower than the lowest ocellus, also 

 a pair of bristles above the base of the antennae; third joint of antennae 

 oval, the arista rather robust, pubescent; thorax in profile strongly con 

 vex; tibiae destitute of long bristles on the outer side; second heavy vein 

 of the wings forked, four slender veins of which the first two and last one 

 are arcuate, the third gently curved S-shaped. Male unknown. Type, the 

 following species : 



Apocephalus pergandei, Coquillett, n. sp. 



Head black, opaque, gray pruinose, the mouth parts and antennae, ex 

 cept the arista, yellow ; thorax yellow, the mesonotum polished ; a pair of 

 short acrostichal bristles, a larger dorso-central pair, two large and a 

 median small pair of supra-alar bristles, one humeral and two posthu- 

 meral bristles, also two on the pteropleura; scutellum yellow, bearing 

 four bristles, middle of metanotum brown ; abdomen yellow, opaque, a 

 pair of spots on the second segment and sometimes on the two following, 

 alteral vitta and the last segment black; abdomen bare except along the 

 sides where each segment except the first bears a few black bristles ; ovi 

 positor black, polished, flattened, lobed near the base where it is slightly 

 wider than the last abdominal segment, the remainder of nearly an equal 

 width, the apex truncated ; a rounded median carina and a pair of oblong 

 cavities near the base ; legs yellowish white, the 

 tarsi brownish yellow, middle tibiae each bearing 

 a strong spur at apex of the inner side; wings 

 hyaline, veins brown, costal fringe scarcely longer 

 than the diameter of the costal vein ; halteres yel 

 low, apices of the knobs blackish ; length, in- 

 eluding the ovipositor, 1.5 mm. Five female speci- 

 mens, one of them bred from a head of Campono- 

 tus Pennsylvania**, by Mr. Th. Pergande, to whom FIG. 21. Apocephalus per- 

 I take pleasure in dedicating this interesting gandei. Head from 



species. Type No. 52OI, U. S. National Museum. front - greatly en 



larged . 



No species of Phora known to me possesses the three charac 

 ters of reclimate frontal bristles, a branched second heavy vein 

 and bristleless tibise ; this fact, and the possession of a long, 

 horny ovipositor, added to the unique habits, would appear to 

 warrant the erection of a separate genus for the reception of the 

 present species. D. W. Coquillett. 



